This document summarizes Pak-Afghan relations between 1947-2017 in two phases. Phase 1 from 1947-2001 saw issues over the Durand line, attacks on Pakistani embassies in Kabul, and changing political dynamics in Afghanistan that impacted relations. Phase 2 from 2001-2017 discusses the aftermath of 9/11, Pakistan facilitating peace talks between the US and Taliban, the establishment of the Karzai government, and recent military operations against militants on both sides of the border.